ST. LOUIS – Esse Health’s Gateway Asthma & Allergy Relief is pleased to announce the addition of board-certified Nurse Practitioner Jaclyn Hey, FNP, to its office in O’Fallon, MO located at 9101 Phoenix Village Parkway.

Hey, a graduate from the University of Missouri in Columbia, Missouri, specializes in asthma and allergy. A registered nurse since 2005, Hey also completed a critical care fellowship at Mercy Hospital in St. Louis.  Hey joins Rabya Mian, M.D. in treating children and adults with asthma, allergy and immunology problems.  Appointments can be made by calling 636-561-5707.

For more than 20 years, the board-certified allergists at Gateway Asthma and Allergy Relief have been treating the metro St. Louis area for asthma, allergy and immunology conditions.  William Johnson, M.D. and Rabya Mian, M.D. believe patient education, frequent communication and customized care plans are the foundation for long-term success.  Gateway Asthma and Allergy Relief is a part of Esse Health, a St. Louis based physician group.  For  more information, visit

Esse Health is a St. Louis-based independent physician group that strives to improve the overall well-being of its patients through patient education, lifestyle modification and prevention. With 35 locations throughout the St. Louis and Metro East area, Esse Health’s services include asthma, allergy and immunology, family medicine, internal medicine, nutrition, pediatrics, radiology, urology, cardiology and gastroenterology. Esse Health is recognized as a leader in using technology in health care and physician accountability for both quality and cost-of-care. For more information on Esse Health, visit